[GitHub] [cloudstack] weizhouapache commented on pull request #4069: [WIP] Ubuntu 20.04 support (as hypervisor)

[GitBox <gi...@apache.org>]

weizhouapache commented on pull request #4069:
URL: https://github.com/apache/cloudstack/pull/4069#issuecomment-629763333


   @rhtyd 
   I checked ubuntu 16.04 just now. you are right. "qemu-img -F" is not supported as mentioned in help. However  the backing file format is set when I create qcow2 with "-F",  hence I think help is not updated. see below.
   
   ```
   root@node42:~# qemu-img create -b /mnt/ee9ffb52-bd20-3328-8a7f-090723db12c4/bd84bcd9-d040-4e9f-a777-617c712b10dc -f qcow2 -F qcow2 bb
   Formatting 'bb', fmt=qcow2 size=2097152000 backing_file=/mnt/ee9ffb52-bd20-3328-8a7f-090723db12c4/bd84bcd9-d040-4e9f-a777-617c712b10dc backing_fmt=qcow2 encryption=off cluster_size=65536 lazy_refcounts=off refcount_bits=16
   
   root@node42:~# qemu-img info bb
   image: bb
   file format: qcow2
   virtual size: 2.0G (2097152000 bytes)
   disk size: 196K
   cluster_size: 65536
   backing file: /mnt/ee9ffb52-bd20-3328-8a7f-090723db12c4/bd84bcd9-d040-4e9f-a777-617c712b10dc
   backing file format: qcow2
   Format specific information:
       compat: 1.1
       lazy refcounts: false
       refcount bits: 16
       corrupt: false
   ```
   
   anyway, I agee with @wido we can probably drop Ubuntu 16.04 support if we release 4.15 next year


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